// ECMAScript 2016
// Array.prototype.includes --------------------------------------
// const arr = ['foo', 1, NaN, false]
// console.log(arr.includes(false))
// console.log(arr.includes(NaN))


// 指数运算 -------------------------------------------------------
// console.log(Math.pow(2, 10))

// 求2的10次方
console.log(2**10) // -> 1024